.wrap {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  margin: 0 auto;
  overflow: hidden;
}
.wrap-inner {
  position: absolute;
  overflow: hidden;
  left: 0;
  width: 640px;
  height: 1238px;
  top: 50%;
  transform: translate(0, -50%);
  -webkit-transform: translate(0, -50%);
}

input {
  border: 0;
  outline: none;
}

input::-webkit-input-placeholder {
  /* placeholder颜色  */
  color: #bababa;
}

.page {
  display: none;
}

.hd {
  background: rgba(0, 0, 0, 0.8);
}
